Commercial Lighting Watts Per Square Foot

Now is where the thinking comes in.

Commercial lighting watts per square foot.

Please choose proper unit of your room area to help us count led lights lux and watts calculation required per square foot meter inch. The formula would look like this. Approximately 8 kwh square foot are consumed by refrigeration equipment. In our example 650 watts divided by 192 89 square feet is 3 37 watts per square feet.

The nec requires a minimum load per square foot for general lighting depending on the type of occupancy table 220 3 a. Consider that light spreads and gets dimmer the farther away it. Today i will explain the third method for lighting design which is watt per square feet method as follows. Lighting power density is the amount of power used by lighting per unit of building area.

Divide the wattage consumed in the room by its area in square feet to calculate watts per square foot. Imagine 4 lights in your 3 200 square foot shop. Learn about how commercial led lights can dramatically reduce energy costs for different building types relative to the standard ashrae watts per sq ft 484 588 5401 facebook. Multiply the shop s square footage by the suggested foot candle requirement and then divide that number by the fixture s lumen output.

Included in the watt measurement is all power consumed by light fixtures ballasts controls transformers etc. Here s the breakdown of how that energy is used. This gives you the total number of fixtures that are ideal for your space. In the united states lpd is measured in watts per square foot.

You can assume a laundry circuit isn t a continuous load and that commercial laundry circuits are rated 1 500va unless noted otherwise in the project drawings or exam question. Commercial spaces like retail stores can utilize many of the same light types but they may not require the same number. 3 200 x 50 160 000. You would need 4 300 watt fixtures to light the shop.

Cia world fact book appendix g. Lighting design basics and terminology part two. This lumen calculation formula is using predefined standard lux levels required for different room types. According to the department of energy doe the average number of kilowatt hours per square foot for a commercial building is approximately 22 5.

Industrial spaces often require more lumens per square foot because of the complicated potentially dangerous nature of work being performed. Essentially if the component or device is involved in lighting it must be.